Modular shower stall



FIG. 1 is a front perspective view of a modular shower stall showing my new design;

FIG. 2 is a cross sectional view taken on line 2--2 of FIG. 1;

FIG. 3 is a cross sectional view taken on line 3--3 of FIG. 1; and

FIG. 4 is a cross sectional view taken on line 4--4 of FIG. 3. 

The ornamental design for a modular shower stall, substantially as shown. 